{"id":1211650,"url":"https://alion.io/job/mangoboost-software-engineer-system-performance-validation-seoul-south-korea","title":"Software Engineer - System Performance & Validation (Seoul, South Korea)","company":{"id":2676410,"name":"MangoBoost","domain":"mangoboost.io","url":"https://alion.io/company/mangoboost","size_band":"51-200","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Greeting","truth_index":{"grade":"A","score":86,"open_postings":18,"ghost_share":0,"stale_share":0.556,"repost_share":0,"time_to_fill_p50_days":null,"computed_at":"2026-10-28T05:59:10Z"}},"role":"Backend","role_family":"Backend","seniority":"junior","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Seoul, South Korea"],"countries":["KR"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":null,"experience_years_min":2,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"C++","optional":false},{"name":"Python","optional":false},{"name":"AI Agents","optional":true},{"name":"InfiniBand","optional":true},{"name":"NCCL","optional":true}],"status":"closed","first_seen_at":"2026-06-25T08:33:38Z","employer_posted_date":"2026-09-25","last_verified_at":"2026-10-13T11:39:02Z","board_verified":false,"closed_at":"2026-10-13T11:39:02Z","days_open":110,"trust":{"level":"ghost","repost_count":0,"flags":["stale","company_stale"],"days_open":109},"description":"Position Overview\nMangoBoost is engineering the full-stack AI infrastructure driving next-generation, hyper-scale AI data centers-spanning advanced AI networking, next-gen GPU systems, high-performance storage, and the full-stack software ecosystem. The Solution Evaluation team is where breakthrough hardware meets production-scale deployment, anchored by methodology-driven system validation and high-performance systems engineering. On this team, you will build multi-node clusters, integrate PCIe-based devices such as DPUs/SmartNICs into real environments, and run hardware-software co-debugging to resolve deep system bugs alongside our HW logic design teams. This role requires a deep, full-stack understanding of modern hardware-software systems to profile complex system bottlenecks and engineer automated evaluation frameworks, providing a direct path to growing into a systems architect or technical lead.\nResponsibilities & Opportunities\nEvaluate next-generation PCIe devices (AI NICs, DPUs, and storage accelerators) through real-world workload execution, characterizing system-wide performance and dynamic behavior\nIsolate complex deployment anomalies by developing advanced validation tools or high-stress injection frameworks, and collaborate directly with HW logic designers to root-cause and debug hardware-software boundary issues\nArchitect, code, and operate automated performance evaluation pipelines to deploy, profile, and tune collective communication workloads across massive multi-node clusters\nLead industry-standard benchmark initiatives (e.g., MLPerf, IO500, SPECstorage) and drive competitive analysis against leading market solutions\nRequired Qualifications\nBS, MS, or PhD in CS, EE, CE, or equivalent practical experience\n2+ years of industry or academic experience in systems programming, test automation development, or software development\nExceptional debugging, software-driven root-cause analysis, and troubleshooting skills on live, bare-metal hardware-software systems\nSolid understanding of modern data center architectures, topologies, and high-speed devices\nStrong coding proficiency (Python, C/C++, Bash, or similar) with a mindset geared toward full automation\nPreferred Qualifications\nHands-on experience scaling and managing heterogeneous GPU infrastructures (e.g., AMD GPU environments) or optimizing distributed collective communication libraries (e.g., NCCL, RCCL)\nPractical experience deploying, configuring, and optimizing large-scale RoCEv2 or InfiniBand networks and fabrics\nDeep background in high-performance networking architectures, DPU/SmartNIC technologies, or enterprise storage protocols\nAbout us\nMangoBoost, Inc.\nAgentic AI is fundamentally reshaping the paradigm of AI infrastructure. As environments emerge where countless AI agents operate simultaneously, conventional data center architectures are reaching their limits in both performance and efficiency. In response to this shift, MangoBoost is pioneering a new approach with its full-stack AI infrastructure solution designed to innovate every layer of the AI data center.\nFrom LLMBoost, our AI inference optimization software, to GPU and storage systems powered by our proprietary DPU architecture, and orchestration software that seamlessly integrates and manages the entire stack, MangoBoost designs and develops every layer of AI infrastructure in-house. Rather than building isolated products, we focus on eliminating system-wide bottlenecks and fundamentally addressing inefficiencies across the entire infrastructure stack.\nMangoBoost’s technology minimizes data movement and coordination overhead while maximizing overall system resource utilization, enabling exceptional performance and optimized total cost of ownership (TCO) for customers. Today, our solutions are already being deployed within real-world AI infrastructure environments through global partners, validating the strength of our technology. Through these efforts, MangoBoost is establishing a new global standard for AI data centers.\nNotice Regarding Return of Hiring Documents\nThis notice is in accordance with Article 11, Section 6 of the Fair Hiring Procedure Act, which allows job applicants, excluding the final successful candidate, to request the return of any recruitment documents they have submitted.\nJob applicants who were not selected as the final candidates in the recruitment process are entitled to request the return of the recruitment documents they submitted within 180 days of the date the employment decision is confirmed. However, this does not apply to documents submitted via the website or email, or documents voluntarily submitted by the applicant without the company’s request. If the recruitment documents are lost due to natural disasters or other reasons for which the company is not responsible, it will be considered as having been returned.\nApplicants wishing to request the return of their recruitment documents should fill out the Request for Return of Hiring Documents [Form 3 of the Enforcement Rules of the Fair Hiring Procedure Act] and submit it by email (). The documents will be sent by registered mail to the designated address within 14 days from the confirmation of submission. Please note that the cost of registered mail will be borne by the recipient.\nThe company will keep the recruitment documents for 180 days following the confirmation of the employment decision. If no request for the return of documents is made within that period, the company will dispose of all recruitment documents without delay in accordance with the Personal Information Protection Act.","description_format":"text","description_chars":5631,"description_truncated":false,"requirements":{"experience_years_min":2,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"phd","optional":true},"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Processors, MCUs & AI Chips","AI Compute & Inference"],"lifecycle":[{"event":"open","at":"2026-09-25T04:30:39Z"},{"event":"close","at":"2026-10-13T11:39:02Z"}],"visa":[],"liveness":null,"pay":null,"html_url":"https://alion.io/job/mangoboost-software-engineer-system-performance-validation-seoul-south-korea","json_url":"https://alion.io/job/mangoboost-software-engineer-system-performance-validation-seoul-south-korea.json","meta":{"generated_at":"2026-10-28T10:39:51Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":14013,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-29T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":2676410},"rest":"https://alion.io/mcp/rest/get_company?id=2676410"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fmangoboost-software-engineer-system-performance-validation-seoul-south-korea"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Fmangoboost-software-engineer-system-performance-validation-seoul-south-korea"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Fmangoboost-software-engineer-system-performance-validation-seoul-south-korea"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/mangoboost-software-engineer-system-performance-validation-seoul-south-korea\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fmangoboost-software-engineer-system-performance-validation-seoul-south-korea"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":1211650}},{"tool":"search_jobs","arguments":{"company":"mangoboost.io","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":1211650},"note":"people open to offers who fit this vacancy"}],"note":"The same data through MCP tools: https://alion.io/mcp/open needs no sign-in (compact searches, postings, people); https://alion.io/mcp with an Alion account has everything. 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